189442064 has 40 divisors (see below), whose sum is σ = 423657408. Its totient is φ = 80380800.

The previous prime is 189442063. The next prime is 189442091. The reversal of 189442064 is 460244981.

It is a super-2 number, since 2×189442064² = 71776591225160192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189442061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2939 + ... + 19685.

Almost surely, 2^189442064 is an apocalyptic number.

189442064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189442064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211828704).

189442064 is an abundant number, since it is smaller than the sum of its proper divisors (234215344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189442064 is a wasteful number, since it uses less digits than its factorization.

189442064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16863 (or 16857 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 189442064 is about 13763.7954067910. The cubic root of 189442064 is about 574.3264339642.

The spelling of 189442064 in words is "one hundred eighty-nine million, four hundred forty-two thousand, sixty-four".